Login/Sign Up
₹60.5
(Inclusive of all Taxes)
₹9.1 Cashback (15%)
Provide Delivery Location
About Callive-500 Tablet 10's
Callive-500 Tablet 10's is used to treat low blood calcium levels. Callive-500 Tablet 10's effectively treats various conditions caused by low calcium levels in the body, such as osteoporosis (weak and brittle bones), osteomalacia/rickets (weak bones), hypoparathyroidism (low levels of parathyroid hormone) and latent tetany (a muscle disease with low blood calcium levels). Callive-500 Tablet 10's can also be given to pregnant, nursing, and postmenopausal women to ensure that they are getting enough calcium.
Callive-500 Tablet 10's consists of two medicines, namely: Calcium carbonate(mineral) and Cholecalciferol(Vitamin D3). Calcium carbonate is a mineral that is used to prevent or treat a calcium deficiency. It provides essential nutrients to maintain bone formation and maintenance. Cholecalciferol(Vitamin D3) is used in the absorption of calcium in the blood. Which helps in the processing of essential minerals in the body like Calcium and Phosphorus. Lack of Vitamin D3 results in bone weakening, bone pain, and skin diseases.
Take Callive-500 Tablet 10's as prescribed by your doctor. You are advised to take Callive-500 Tablet 10's as long as your doctor has prescribed it for you, depending on your medical condition. In some cases, Callive-500 Tablet 10's can cause side effects like constipation or stomach upset, nausea, vomiting, loss of appetite, mood changes, weakness, tiredness, fast or pounding heartbeat, bone/muscle pain, and headache. Most of these side effects of Callive-500 Tablet 10's do not require medical attention and gradually resolve over time. However, if these side effects persist longer, please consult your doctor.
If you are known to be allergic to Callive-500 Tablet 10's or its inactive components, please inform your doctor. Pregnant or breastfeeding women should consult their doctor before taking Callive-500 Tablet 10's. Higher doses of Vitamin D than the recommended daily dose should be used in pregnant women only when advised by the doctor. Callive-500 Tablet 10's may pass into the breast milk. Hence, breastfeeding mothers need to seek medical advice before starting Callive-500 Tablet 10's. Do not take Callive-500 Tablet 10's if you have hypercalcemia (high calcium levels), hypervitaminosis D (high vitamin D levels), and malabsorption syndrome (difficulty absorbing nutrition from food).
Uses of Callive-500 Tablet 10's
Directions for Use
Medicinal Benefits
Callive-500 Tablet 10's is a combination of three drugs, Calcium carbonate(mineral) and cholecalciferol (Vitamin D3) used to treat low blood calcium levels and various associated conditions caused by low calcium levels in the body, such as osteoporosis (weak and brittle bones), osteomalacia/rickets (weak bones), hypoparathyroidism (low levels of parathyroid hormone) and tetany (a muscle disease with low blood calcium levels). Calcium carbonate is a mineral and prevents or treats calcium deficiency. It helps to maintain bone and teeth health. Cholecalciferol(Vitamin D3) treats calcium deficiency with hypoparathyroidism (the parathyroid glands' decreased activity) and metabolic bone diseases in people with chronic kidney failure.
How Callive-500 Tablet 10's Works
Storage
What if I have taken an overdose of Callive-500 Tablet 10's
Drug Warnings
If you are known to be allergic to Callive-500 Tablet 10's or any other medicines, please tell your doctor. If you are pregnant or planning to become pregnant, it is advised to inform your doctor before using Callive-500 Tablet 10's. Higher doses of Vitamin D than the recommended daily dose should be used in pregnant women only when advised by the doctor. Cholecalciferol in higher doses may harm the foetus. Callive-500 Tablet 10's may pass into the breast milk, hence consult your doctor before taking Callive-500 Tablet 10's if you are a breastfeeding mother. Callive-500 Tablet 10's should be used with caution in children and only if prescribed by a doctor. Cholecalciferol in Callive-500 Tablet 10's can affect growth in children. Inform your doctor if your child is not growing at a normal rate while using Callive-500 Tablet 10's. Callive-500 Tablet 10's is not recommended if you have hypercalcemia (high calcium levels), metastatic calcification (extra deposits of calcium in the body), hypervitaminosis D (high vitamin D levels), and malabsorption syndrome (difficulty absorbing nutrition from food). Inform your doctor before taking Callive-500 Tablet 10's if you have any heart/kidney/liver/blood vessel diseases, kidney stones, sarcoidosis (growth of inflammatory cells in different parts of the body), Crohn's disease (inflammatory bowel disease), Whipple's disease (bacterial infection affecting joints and digestive system), achlorhydria (little or no stomach acid), low levels of bile, and phosphate imbalance. Callive-500 Tablet 10's contains sugar or sorbitol; hence caution should be taken to have an intolerance to sugars, diabetes, and phenylketonuria (increased levels of an amino acid called phenylalanine).
Drug-Drug Interactions
Login/Sign Up
Drug-Food Interactions
Login/Sign Up
Diet & Lifestyle Advise
Habit Forming
Therapeutic Class
Product Substitutes
Alcohol
Caution
Drinking alcohol can affect calcium absorption; hence it is advised to limit the alcohol intake while using Callive-500 Tablet 10's.
Pregnancy
Caution
During pregnancy, use higher doses of Callive-500 Tablet 10's than the daily dietary allowance only when advised by the doctor. Calcitriol in higher doses may harm the foetus. Your doctor will weigh the potential risks and benefits before prescribing Callive-500 Tablet 10's.
Breast Feeding
Caution
Consult your doctor before taking Callive-500 Tablet 10's if you are breastfeeding. Callive-500 Tablet 10's can pass into the breast milk. If Callive-500 Tablet 10's is used during breastfeeding, please monitor the mother and the infant's serum calcium levels.
Driving
Caution
No interaction found/established
Liver
Caution
Let your doctor know if you have any history of liver diseases before taking Callive-500 Tablet 10's. Hepatic impairment/liver disease can alter the metabolic and therapeutic activity of certain Vitamin D forms.
Kidney
Caution
It is advised to seek doctor advice before starting Callive-500 Tablet 10's if you have kidney diseases like kidney stones or undergoing dialysis. Calcitriol in Callive-500 Tablet 10's increases inorganic phosphate levels in serum; hence caution should be taken in patients undergoing dialysis to maintain adequate phosphorus levels and avoid ectopic calcification (calcium deposition).
Children
Caution
Callive-500 Tablet 10's should be used with caution in children and only if prescribed by a doctor.
Have a query?
Callive-500 Tablet 10's used to treat low blood calcium levels. Callive-500 Tablet 10's effectively treats various conditions caused by low calcium levels in the body, such as osteoporosis (weak and brittle bones), osteomalacia/rickets (weak bones), hypoparathyroidism (low levels of parathyroid hormone) and latent tetany (a muscle disease with low blood calcium levels). Callive-500 Tablet 10's can also be given to pregnant, nursing, and postmenopausal women to ensure that they are getting enough calcium.
Callive-500 Tablet 10's is a nutritional supplement that can be taken by people who have low levels of calcium in their blood and it keep the bones healthy and strong and is even effective in Chronic arthritis and Osteoporosis.
Callive-500 Tablet 10's is used to increase low levels of calcium in the body. Hence it is not advised to use Callive-500 Tablet 10's during hypercalcemia, since it causes the overdose of calcium leading to kidney stones and other effects.
Do not use Callive-500 Tablet 10's if you are allergic to Callive-500 Tablet 10's or any other ingredients in it. Callive-500 Tablet 10's is not recommended in hypercalcemia (high calcium levels), metastatic calcification (extra deposits of calcium in the body), hypervitaminosis D (high vitamin D levels), and malabsorption syndrome (difficulty absorbing nutrition from food).
Individual factors, including health needs, diet, and lifestyle, influence the optimal timing for taking Callive-500 Tablet 10's. Furthermore, the timing may require adjustment to prevent interactions if you're taking other medications. Consulting a healthcare professional is crucial for personalized guidance tailored to your unique needs and circumstances.
Callive-500 Tablet 10's offers numerous benefits, including supporting bone health, essential for bone mineralization, and potentially reducing the risk of osteoporosis. Adequate calcium and vitamin D intake helps maintain strong bones and teeth while supporting muscle function and nerve transmission. Overall, Callive-500 Tablet 10's plays a vital role in maintaining overall health and well-being, particularly bone health.
Swallow the whole Callive-500 Tablet 10's with a glass of water, taking care not to crush, chew, or break it.
Do not take Callive-500 Tablet 10's if you have kidney disease, high levels of calcium in your blood (hypercalcemia), or a history of kidney stones, as it may worsen these conditions. It is crucial to inform your doctor about your medical history, underlying health conditions, and all medications you're currently taking to avoid potential interactions or adverse effects. Failure to do so may result in serious health complications. Consult your doctor or healthcare professional for personalized advice and careful monitoring.
Taking Callive-500 Tablet 10's more than the recommended dose leads to overdose, which might cause nausea/vomiting, loss of appetite, mental/mood changes, headache, drowsiness, weakness, and tiredness. If you suspect an overdose or unusual symptoms, seek medical attention right away.
The recommended daily intake of vitamin D varies based on factors such as age, sex, health status, diet, and lifestyle. It's best to consult your healthcare provider to determine the optimal dosage for your needs. They will consider your health status, medications, dietary habits, lifestyle, and other factors to recommend a suitable dose.
Low vitamin D levels can lead to various health issues, including weakened bones, increased risk of fractures, fatigue, mood changes, impaired immune function, infections, autoimmune diseases, cardiovascular disease, cognitive impairment, and neurodegenerative diseases. Severe deficiency can cause rickets in children and osteomalacia in adults. It is essential to maintain adequate vitamin D levels through sun exposure, diet, and supplements (if necessary). Consult a healthcare professional for personalized advice.
The common side effects of Callive-500 Tablet 10's, which may occur in some individuals, include constipation or stomach upset, nausea, vomiting, loss of appetite, mood changes, weakness, tiredness, fast or pounding heartbeat, bone/muscle pain, and headache. Most of these side effects of Callive-500 Tablet 10's do not require medical attention and gradually resolve over time. However, if these side effects persist longer, please consult your doctor.
Country of origin
Manufacturer/Marketer address
We provide you with authentic, trustworthy and relevant information
Buy best Nutrition & Metabolism products by
VITAMINS AND MINERALS
OTHER SUPPLEMENTS
HEMATINICS
BONE & JOINT SUPPLEMENTS
WOMEN HEALTH SUPPLEMENTS
AMINO ACID SUPPLEMENTS
GASTRIC DISORDERS SUPPLEMENTS
IMMUNE HEALTH SUPPLEMENTS
WEIGHT LOSS AND WEIGHT GAIN
CARDIAC SUPPLEMENTS
DIABETICS SUPPLEMENTS
APPETITE SUPPRESSANTS
RESPIRATORY DISEASE SUPPLEMENTS
APPETITE STIMULANTS
NUTRITIONAL SUPPLEMENTS
Others
AYUR
Shelcal
Cipcal
Neurobion
ULTRA
LAMINO
Evion
NUSOWIN
GROVIVA
CENTRUM
ESSENTIAL
ETHIGLO
MAXIRICH
REAL
TRUST
WELLMAN
WELLWOMAN
ZEST
B-PROTIN
BIOVIT
CELEVIDA
DIABETONE
FOLLIHAIR
Ferrero
Hair Shield
KONFIDENT
Livogen
NEO
OBICURE
OSTOCALCIUM
PULMOCARE
REJUHAIR
SAN
SEVENSEAS
ZEFRICH
ZINCOVIT
ALBUMEN
BILOGIN
BONHEAL
BOOST
CALCIMAX
CAVENOR
CEEPLUS
CHARAK
COERINGA
CURKEY
CUTISHINE
DELTA
DIAPRO
Depura
ECOPROT
ENSURE
EVACURE
FEMARELLE
FIXDERMA
FOLIGLO
GOLITE
HAIRBLESS
HI LIFE
IMMUNACE
IMUNBITES
JOY
KERASHINE
KETO
Kinder
L-SKIN
LIBERO
LOGIHAIR
MAXVIDA
MINOIL
MMS
NIKOMED
NURTURE
NUTRASWISS
NUTREX
NUTRIGAIN
NUTRIX
OSTEOCARE
Orasore
PAPULEX
PEDIA GOLD
PENTASURE
PERFECTIL
POLO
PROTINULES
PROTOTAL
QUANTO
RENU
REVITAL
ROSIFLEX
SECURE
STIM
SUPRA
TUSKCA
VIDASLIM
VISIONACE
VIVAMOM
WELL GROW
WELLBABY
Abbott India Ltd
Alniche Life Sciences Pvt Ltd
Intas Pharmaceuticals Ltd
Elder Pharmaceuticals Ltd
Alkem Laboratories Ltd
La Renon Healthcare Pvt Ltd
Cipla Ltd
Fourrts India Laboratories Pvt Ltd
Leeford Healthcare Ltd
Torrent Pharmaceuticals Ltd
East West Pharma India Pvt Ltd
Akumentis Healthcare Ltd
Zydus Cadila
Lupin Ltd
Macleods Pharmaceuticals Ltd
Olcare Laboratories Pvt Ltd
Eris Life Sciences Ltd
Koye Pharmaceuticals Pvt Ltd
Zee Laboratories Ltd
Mankind Pharma Pvt Ltd
Aristo Pharmaceuticals Pvt Ltd
Indoco Remedies Ltd
Sanatra Healthcare Ltd
Dr Reddy's Laboratories Ltd
Yuventis Pharmaceuticals
Meyer Organics Pvt Ltd
Vasu Organics Pvt Ltd
Micro Labs Ltd
Sun Pharmaceutical Industries Ltd
Ajanta Pharma Ltd
Emcure Pharmaceuticals Ltd
Levin Life Sciences Pvt Ltd
Apple Life Sciences
Zydus Healthcare Ltd
Adonis Laboratories Pvt Ltd
Unipark Biotech Pvt Ltd
3M India Ltd
Cadila Healthcare Ltd
Capital Pharma
Prevego Healthcare & Research Pvt Ltd
Anglo French Drugs & Industries Ltd
Corona Remedies Pvt Ltd
DR Johns Lab Pharma Pvt Ltd
Intra Life Pvt Ltd
Medishri Healthcare Pvt Ltd
Aarux Pharmaceuticals Pvt Ltd
BSA Pharma Inc
Maxamus Pharma Pvt Ltd
Rhine Biogenics Pvt Ltd
Spa Newtraceuticals Pvt Ltd
Venera Pharma
Winmark Healthcare Pvt Ltd
Brio Bliss Life Science Pvt Ltd
Fenestra Pharmaceuticals Pvt Ltd
Gh Vision Care Life Sciences
Medley Pharmaceuticals Ltd
Pharmed Ltd
Tas Med India Pvt Ltd
Troikaa Pharmaceuticals Ltd
Albert David Ltd
Biophar Lifesciences Pvt Ltd
Glenon Healthcare
Innovcare Life Sciences Pvt Ltd
Intra Labs India Pvt Ltd
Morepen Laboratories Ltd
Quality Pharma
Signova Pharma
Steris Healthcare
Tricept Life Sciences Pvt Ltd
Zuventus Healthcare Ltd
Ardent Life Sciences Pvt Ltd
Chemo Healthcare Pvt Ltd
Dr Morepen Ltd
Friska Nutraceuticals Pvt Ltd
Matias Healthcare Pvt Ltd
Mova Pharmaceutical Pvt Ltd
Sherim Squibss Pharmaceuticals
Syndicate Life Sciences Pvt Ltd
Altcare Pharmaceuticals Pvt Ltd
Bioceutics Inc
Cachet Pharmaceuticals Pvt Ltd
Indchemie Health Specialities Pvt Ltd
Inex Medicaments Pvt Ltd
Modi Mundipharma Pvt Ltd
Aarohi Pharmaceuticals Ltd
Acme Pharmaceuticals
Alembic Pharmaceuticals Ltd
Alteus Biogenics Pvt Ltd
British Biologicals
Canvarzys Healthcare Ltd
Daffoworth Pharmaceutical Pvt Ltd
Elbrit Life Sciences Pvt Ltd
Femura Pharmaceuticals Pvt Ltd
Gynofem Healthcare Pvt Ltd
Hetero Healthcare Pvt Ltd
Knoll Healthcare Pvt Ltd
Linux Laboratories Pvt Ltd
Lyceum Life Sciences Pvt Ltd
Mediart Life Sciences Pvt Ltd
Millennial Pharmaceuticals Pvt Ltd
Ponoogun Healthcare Pvt Ltd
Raptakos Brett & Co Ltd
Ventus Pharma
Waylon Biotech Pvt Ltd
Zeno Bio Life Science Pvt Ltd
Akesiss Pharma Pvt Ltd
Cadila Pharmaceuticals Ltd
Daris Biocare
Edence Life Sciences Pvt Ltd
Glenmark Pharmaceuticals Ltd
Healing Pharma
Iva Healthcare Pvt Ltd
Jagsam Pharma
Kaps Three Life Sciences Pvt Ltd
Merck Ltd
Meu Amor Life sciences Pvt Ltd
Msn Laboratories Pvt Ltd
Neiss Labs Ltd
Nest Pharma
Orchis Pharmaceuticals
Ozone Pharmaceuticals Ltd
Plasoron Biotech Pvt Ltd
Procter & Gamble Health Ltd
Rostrumed Biotech Pvt Ltd
Sanofi India Ltd
Torque Pharmaceuticals Pvt Ltd
Unichem International
Zenvita Healthcare Pvt Ltd
Zota Health Care Ltd
Aareen Healthcare Pvt Ltd
Apex Laboratories Pvt Ltd
Aurz Pharmaceutical Pvt Ltd
Axonav Healthcare Llp
Butson Biosciences
Byby Healthcare
Centaur Pharmaceuticals Pvt Ltd
Cnx Health Care Pvt Ltd
Crms Pharmaceutical Pvt Ltd
Gates Byby Pharma
GlaxoSmithKline Pharmaceuticals Ltd
Human Biolife India Pvt Ltd
Hymax Healthcare Pvt Ltd
Integral Lifesciences
Jupiter Biolabs Pvt Ltd
Kepler Healthcare Pvt Ltd
Kreativ Life Sciences Pvt Ltd
Larivin Pharma Pvt Ltd
Lincoln Pharmaceuticals Ltd
Mano Pharma
Med Manor Organics Pvt Ltd
Medgen Drugs And Laboratories Pvt Ltd
Miotic Pharma
Nutraferon Pvt Ltd
Primus Remedies Pvt Ltd
Pristine Pearl Pharma Pvt Ltd
Regenix Drugs Ltd
Senechio Pharma Pvt Ltd
Startos Healthcare Pvt Ltd
Truhealthy Llp
Uvb Healthcare Pvt Ltd
Zenacts Pharma Pvt Ltd
Aggrowin Pharma
Alienist Pharmaceutical Pvt Ltd
Clover Health Care Pharma
Dwd Pharmaceuticals Ltd
Genesis Biotech
Glynis Pharmaceuticals Pvt Ltd
Gopal Life Sciences
Ikon Remedies Pvt Ltd
Invision Medi Sciences Pvt Ltd
Kaira Drugs Pvt Ltd
Laxian Healthcare
Matteo Health Care Pvt Ltd
Nutrigold India Pvt Ltd
Olamic Pharma Pvt Ltd
Origin Health Care Pvt Ltd
Radicool Pharmaceuticals Pvt Ltd
Saiboon Lifecare Pvt Ltd
Shield Healthcare
Sifco Pharma
Solarium Pharmaceuticals
Solveig Life Sciences Pvt Ltd
Universal Nutriscience Pvt Ltd
Wanbury Ltd
Warner (India) Pharma Pvt Ltd
Worth Medicines India Pvt Ltd
Xemex Life Sciences
Zepsilon Healthcare Pvt Ltd
4Care Lifesciences Pvt Ltd
Acclimate Life Sciences
Adonis Phytoceuticals Pvt Ltd
Akcent Healthcare India Pvt Ltd
Alna Biotech Pvt Ltd
Amdis Healthsciences Pvt Ltd
An Pharmaceuticals Pvt Ltd
Angel Biotech
Antex Pharma Pvt Ltd
Apple Pharmaceuticals
Ark Life Science Pvt Ltd
Arvincare
Astrum Healthcare Pvt Ltd
Aurel Biolife
Belgrand Pharmaceuticals Pvt Ltd
Biochemix Health Care Pvt Ltd
Biotics Lab
Converge Biotech Pvt Ltd
D D Pharmaceuticals Pvt Ltd
Dermacia Healthcare
Dolvis Bio Pharma Pvt Ltd
EVERVITAL LIFESCIENCES
Endocard India Pvt Ltd
Era Pharmaceuticals Pvt Ltd
Eveksia Pharma Pvt Ltd
Fresenius Kabi India Pvt Ltd
Galpha Laboratories Ltd
German Remedies Ltd
Gonan Pharma
Graciera Pharmaceuticals Llp
Harrison Healthcare
Henry Pharmaceuticals
Hicure Biotech Pvt Ltd
Himerus Medical Solutions Llp
Hitech Medicare
Hs Aldem Healthcare
Icarus Health Care Pvt Ltd
Indiabulls Pharmaceuticals Pvt Ltd
Ipca Laboratories Ltd
Jms Medicon Pvt Ltd
Lia Life Sciences Pvt Ltd
Mdc Pharmaceuticals Pvt Ltd
Medopharm Pvt Ltd
Medwock Pharmaceuticals Pvt Ltd
Novelty Healthshine Pvt Ltd
Olympus Therapeutics Pvt Ltd
Ordain Health Care Global Pvt Ltd
Panacea Biotec Ltd
Pfizer Ltd
Prognosis Healthcare
Rayon Pharmaceuticals
Remington Life Sciences Llp
Sargas Life Sciences Pvt Ltd
Senvion Biotech
Sparlife Healthcare
Starus Pharmaceuticals
Symbiosis Pharmaceuticals Pvt Ltd
Tms India
Triumph Pharmaceuticals Pvt Ltd
Trumac Healthcare
West Coast Pharmaceuticals Pvt Ltd
Zelleven Healthcare Pvt Ltd
Zentiva Pvt Ltd
Zerico Lifesciences Pvt Ltd
3 Gen Pharmaceuticals
AV Grow Health Care
Aagam Life Sciences Pvt Ltd
Adisys Healthcare
Allites Life Sciences Pvt Ltd
Anthem Bio Pharma
Asthev Healthcare Pvt Ltd
Atlantis Pharmacorp Inc
Axis Life Science Pvt Ltd
Azillian Healthcare Pvt Ltd
Beat Pharmaceuticals
Biochem Pharmaceutical Industries Ltd
Biorex Healthcare Pvt Ltd
Biovitamins Pvt Ltd
Clamed Healthcare Pvt Ltd
Clyde Pharmaceutical Pvt Ltd
Consern Pharma Ltd
Delcure Life Sciences Ltd
Depsons Healthcare
Fedler Lifesciences
Foregen Healthcare Ltd
Genix Lifescience Pvt Ltd
Gladstone Pharma India Pvt Ltd
Harvey Laboratories (P) Ltd
Hauz Pharma Pvt Ltd
Healthon Pharmaceuticals Pvt Ltd
Hicxica Formulations Pvt Ltd
Ind Swift Laboratories Ltd
J B Chemicals & Pharmaceuticals Ltd
Jagsonpal Pharmaceuticals Ltd
Jubilant Generics Ltd
Klm Laboratories Pvt Ltd
Krishna Health Care
Maneesh Pharmaceuticals Ltd
Marckswin Lifescience
Medford Pharmaceuticals
Mediverge Healthcare Pvt Ltd
Medlogix Bio Lifesciences
Menschlich Healthcare (Opc) Pvt Ltd
Mibsons Pharmaceuticals Pvt Ltd
Midas Health Care
Mint Pharmaceuticals Pvt Ltd
Mtcare Lifesciences Pvt Ltd
Nextgen Healthcare
Nova Indus Pharmaceuticals
Novacon Pharmaceuticals Pvt Ltd
Nutrilis Healthcare Pvt Ltd
Nuvox Healthcare Pvt Ltd
Specialty Supplements
CALCIUM
VITAMIN B12
VITAMIN D
VITAMIN B9
IRON
SPECIALITY SUPPLEMENT
VITAMIN B
FISH OIL OMEGA
VITAMIN C
VITAMIN E
ZINC
MAGNESIUM
VITAMIN B1
COLLAGEN
Cod Liver Oil
Flax seed Oil
Appetite Suppressant
VITAMIN A
VITAMIN B5
APPETITE STIMULANT
Fat Burner
VITAMIN B3
VITAMIN B6
VITAMIN K
NUTRITION DRINK
POTASSIUM
VITAMIN B2
WHEY PROTEIN
BODY GEL
Chromium
ENERGY DRINK
GREEN TEA
MULTIVITAMIN
SPECIALITY NUTRITION DRINK
Shampoo